If the update fails, you may need to perform a factory reset by holding down the reset button for 10-15 seconds.

Firmware is the built-in software that acts as the brain of your router, controlling everything from data routing to security protocols. Manufacturers like D-Link release firmware updates for several vital reasons:

Downloading and updating the firmware for your DLINK DSL-124 router is a straightforward process. Here's a step-by-step guide:

Never attempt a firmware update over Wi-Fi. If the wireless signal drops for a split second during the flash, your router will be ruined. Plug your computer directly into one of the router’s LAN ports using an Ethernet cable.

This is the most commonly missed step. The DSL-124 has at least two hardware revisions: and B1 (possibly C1 in some markets). Firmware is not interchangeable between revisions.

Localized firmware is available through the D-Link Russia download server . Critical Lifecycle Note

– The router will reboot automatically. The power LED will blink during the process.

Before you begin the download or installation, follow these critical safety steps to avoid bricking your router:

Note the letter and number combination (e.g., H/W Ver: T1 , V1 , or A1 ).

The D-Link DSL-124 reached its End-of-Support (EOS) / End-of-Life (EOL) on . This means:

Plug the other end into any of the available LAN ports (usually yellow) on the back of the DSL-124.

But now the beat-your-device drum: where you get that firmware matters. D-Link’s official support pages are the obvious first stop — manufacturer sites are the safest source because they serve files matched to specific hardware revisions. The DSL-124 family has been around a while, and D-Link has released multiple hardware revisions over time; flashing the wrong file is a fast track to a bricked piece of plastic and regret. So double-check the model label on your unit, note the hardware version (often printed on the sticker as “Ver. X.X”), and match it exactly before you click “upgrade.”